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J. BURKE.

Harvester. No. 70,798. Patented Nov. 12, 1867.

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JOHN BURKE, OF SYCAMORE, ILLINOIS. Letters Patent No. 70,798, datedNovembeflQ, 1867.

IMPROVEMENT IN HARVESTERS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, JOHN BURKE, of Sycamore, in the county of DeKalb, inthe State of Illinois, have invented a new and useful Improvement in aDevice for Raising and Lowering the Gear-Frame (or drive-wheel frame) ofa Harvesting Machine; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe accompanying drawings, making a part of this specification, inwhich--- 1 Figure 1 is a backview of the gear-frame and a part of themain frame of a harvester having my invention applied thereto.

Figure 2 is a side view of the same.

Figure 3 is a front view of the gear-frame with drive-wheel therein,showing my invention.

Figure 4 is a detail.

Similar letters of reference indicate corresponding parts in the fourfigures. 7

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A represents an adjustable gear or wheel-frame. B is the drive-wheelplaced therein, and attached thereto by its axle in boxes a a, figs. 2and 3. Said gear or wheel-frame is placed within or between the sidepieces b b of the main frame 0. c c are the under pieces of said mainframe, and extend out towards the platform frame, which should beattached to said pieces 0 c. A slotted bar or standard, D, is fitted andfirmly bolted in a recess cut across the middle of the face of the backpiece (or end piece)'of frame A, fig. 1. A corresponding recess is cutacross the edge of piece 0 of main frame for said standard D. Across theslot in standard D are formed notches at regular intervals, (or equaldistances apart.) A bolt, cl, reaches through piece 0 (of main frame)and slot of standard D, far enough-F0 receive upon it, first, a piece orwasher, E, having upon one end a ridge made to fit the notches cutacross the face of D, which said pieceE may be called a register, andsecond, a thumb-nut or burr, e, for said bolt d, (outside the register.)To the front end of each of the side pieces of frame A are attached andsecurely fastened two slotted plates F F, the shape and position ofwhich are shown in figs 2 and 3. Bolts ff, respectively, reach througheach of the side pieces 6 b of main frame and slots of F F far enough toreceive upon them, first, the dogs or latches G G, (the shape ofwhichare par ticularly shown in fig. 4;) and second, the nuts or burrs gg. Notches, corresponding in number and distance apart with the notchesacross the face of standard D, are formed across the faces of thoseparts of the plates F F which jut directly from the front ends of theside pieces of frame A, fig. 3.

This invention is peculiarly applicable to such harvesting machines asare balanced on drive-wheel, and are used with'rigid (or stiff) pole.

The operation is as follows: To raise or lower the gear or drive-wheelframe, llloosen the thumb-nut e, (which is screwed over the register13],) so that the index of the register will pass over from one notch toanother. Then unlatch the dogs G G and shift the frame A, using as leverthe pole of the machine, (which should be rigidly fastened to the frontof main frame at the end of piece 6, or other substantial manner,) tosuch position, either up or down, as may be required, and let the dogs GG catch into corresponding notches in the plates F F. Thus the front endof the frame A is placed where it may be desired. Then level, or rathersquare, the frame A with main frame,-by slipping up or down on standardD, to proper position with index of.

register in such notch as shall correspond with notches in plates F F,and screw up, by thumb-nut e, tightly. Thus it will be seen that thedrive-wheel frame, to which, of course, should be attached the gearing,may be raised or lowered with facility, and adjusted at right angleswith the main frame, and may be held in required position rigidly.

Having thus described my invention, I claim as new, and desire to secureby Letters Patent- 1. The combination of slotted plates F F, providedwith notches, attached to front end of gear-frame A, with standard D,provided with corresponding notches at back end of said gear-frame, sothat said gear-frame may be thus raised or lowered equally at both endsand parallel with main frame, suhstant ally as set forth.

2. I claim the combination of slotted plates with ratchet, consisting ofplates 1 F and dogs G G, substantially as described and for the purposespecified. I

3. I claim the dogs G G, for purpose specified.

JQHN BURKE.

Witnesses:

Ones. W. Mnnsn, O. D. Mosnnn.

